Bearing



April1 1941- J. WILLIAMS 2,239,834

BEARING Filed Dec. 12, 1939 Juclsazv m [Zia as Patented Apr. 29, 1941UNITED STATE PATE OFFICE amma Judson Williams, Philadelphia, Pa. eeplieiien Decembe 1939, er a N 8 5 Claims. (oi. s-2s s n n n r lates to an mr ved beari e ia l t nded or use i on un tion wit the n c in ods tw wcvle engines. atoueh owev r as w ll late p ea t e bea in is w l su ed forhe da tat on and I do h o wi h. t be limited i s respe t. As w be aated, he thrust n thereonthe rod.

Di l i exper enced by eason f the fa t that,

The effebt is l m i lhil ironb c lne n.

small engines such as out card motors and, to overcome the difficulty,

2 .1 Pra ti e conventiona ly with use of the engine.

It is therefore an object of the present invention to provide a hearingwhich will have substantiallv a snug working fit with the, crankpinwhile, however, grabbing of the pin by the bearing Will be avoided.

A further object of the invention is to provide a bearing wherein,contraction of the bearing will bing of the pm by. the bearing.

Still another object of the invention is to prowear as the bearingcontracts to thus protect the J rnal plate and also obviate grabbing ofthe pin by the bearing.

And the invention seeks, as a still further object, to provide a,bearing wherein the centersimilar to Figure 3 but at a tion proceeds,many other adaptations.

The shank of the connecting rod. is indicated at If! and the usualbearing at the small end of the red at H. end is an arcuate therewith isa like section l3. r Prov d s w h more and the The section '12 of thehearing may Well he termed the load bearing section. As will beappreciated, the thrust on the connecting rod of a two-cycle engine is,when the engine is in operation, substantially continuous in onedirection thrust load will be transmitted through the bearing section l2at each stroke of the engine piston. In Figure 3 of the drawing, a crankshaft pin is conventionally shown at it.

Formed on the bearing section l2 or otherwise fixed thereto at its innerside is a raised medially disposed journal plate l1. As will beobserved, this plate terminates short of the ends of the section butoccupies the greater portion of the length thereof and extendssubstantially from edge to edge of the section.

The section l3 provides a cap and formed on said section or otherwisefixed thereto at its inner side are spaced transverse centering ribs l8extending substantially from edge to edge of the section in parallelrelation. Two of these ribs are preferably disposed at the ends of thesection and two more equally spaced therebetween and, as will be noted,the ribs are of the same height as the journal plate ll of the sectionl2. A less number of ribs may be used or, conversely, a few ribs may bedisposed diagonally of the section if or otherwise. As will laterappear, however, it is important that the ribs be of the fewest numberfeasible.

As brought out in Figure 3 of the drawing, the journal plate I! isformed to fit flat throughout its length against the pin it and contactsthe pin at one side thereof while the ribs 18 contact the pin at itsopposite side for centering the bearing on the pin. The plate l1 thuspresents a long. bearing surface for transmitting the thrust load andsaid plate in conjunction with the ribs l8 provide a substantially snugworking fit for the bearing about the pin. Thus, excessive looseness asis practiced in connection with the bearings of conventional rods, asheretofore pointed out, is eliminated while also, straightline contactbetween the bearing and pin is avoided.

It is now to be observed that the combined area of the edges of the ribsl8 in contact with the pin it is much less than the area of the platell, saya fourth or possibly a fifth, and for such and, therefore, the

reason only a few ribs are preferably used. Ac-

cordingly, as the bearing contracts, the ribs will, being the weakestparts in contacts with the pin, be crushed by the p'n to thusautomatically accommodate such contraction of the bearing and avoidgrabbing of the pin by the bearing. Furthermore, as the reciprocation ofthe connecting rod continues, the ribs will then undergo sufficient Wearto provide operating clearance for the contracted bearing while, at thesame time, the journal plate I? will be protected by being held flatagainst the pin by the ribs so that localized wear on the plate torender it out-of-round will be avoided. As will be understood, the platel1 and ribs l8 may be of the same metal as the bearing sections or ofany special alloy preferred for wearing qualities.

Defined between the ribs l8 are oil channels l9 and formed through thebearing section 13 to communicate with said channels are oil passages20. Thus, oil will be freely admitted to the pin it. However, the mainpurpose of the channels I9 is not to provide for lubrication of the pinespecially but to accommodate a free circulation of a large volume ofoil through said channels for warming the bearing and as only a few ofthe ribs it are employed, the channels are correspondingly wide tofacilitate the objective sought. As will be understood, oil in an enginecrank case quickly becomes heated after the engine is started and thiswarm oil circulating through said channels will tend to maintain thebearing at an even temperature and overcome contraction of the hearing.

In the present instance, I have shown the journal plate I! and ribs 18integral with the bearing sections. As will be appreciated, however,said plate and ribs may be carried by a sleeve, lining or bushinginserted in a hearing or formed within the bearing and it is accordinglyto be understood that such variations fall within the spirit and scopeof the present invention.

Having thus described my invention, I claim:

1. A hearing for the connecting rod of an engine developing a thrustload in a single direction on the rod and including a portion having ajournal surface of substantially less than and shaped to a working fitwith a revolving element, said surface being disposed on that portion ofthe rod fashioned to receive said load, and a portion having a partthereon to coact with said element for normally maintaining said surfacein working engagement with said element but of attenuated mass incapableof sustaining the thrust load and presenting only frail area in workingcontact with said element to be mutilated thereby as the bearing shrinksand avoid grabbing of said element by the bearing when chilled.

2. A bearing having a portion provided with a journal surface ofsubstantially less than 180 and shaped to a Working fit with a revolvingelement to receive the thrust load, and a portion having means thereonto coact with said element for normally maintaining said surface inworking engagement with said element but of attenuated mass incapable ofsustaining the thrust load and presenting only frail area in workingcontact with said element to be mutilated thereby as the bearing shrinksand avoid grabbing of said element by the bearing when chilled.

3. A bearing having a portion provided with a journal surface ofsubstantially less than 180 and shaped to a working fit with a revolvingelement to receive the thrust load, and a portion having a rib thereonto coact with said element for normally maintaining said surface inworking engagement with said element but of attenuated mass incapable ofsustaining the thrust load and presenting only frail area in workingcontact with said element to be mutilated thereby as the hearing shrinksand avoid grabbing of said element by the bearing when chilled.

4. A sectional bearing having a section provided with a journal surfaceof substantially less than 180 and shaped to a working fit with arevolving element to receive the thrust load, and a mating sectionhaving a rib rising therefrom to coact with said element for normallymaintainlng said surface in working engagement with said element but ofattenuated mass incapable of sustaining the thrust load and presentingonly frail area in working contact with said element to be mutilatedthereby as the bearing shrinks and avoid grabbing of said element by thehearing when chilled.

5. A sectional bearing having a section provided with a raisedcircumferential journal surface of substantially less than 180 andshaped to a working fit with a revolving element to receive the thrustload, and a mating section hav ing spaced transverse ribs rising fromthe inner face thereaf to coact with said element for normallymaintainin said surface in working engagement with said element butrespectively of attenuated mass incapable of sustaining the thrust loadand together presenting only an aggregate frail area in working contactwith said element to be mutilated thereby as the bearing shrinks andavoid grabbin of said element by the bearing when chilled. v

J UDSON WILLIAMS.

